_Safe_iterator_base * _M_const_iteratorsThe list of constant iterators that reference this container. _Safe_iterator_base * _M_iteratorsThe list of mutable iterators that reference this container. unsigned int _M_versionThe container version number. This number may never be 0.

Swap this sequence with the given sequence. This operation also swaps ownership of the iterators, so that when the operation is complete all iterators that originally referenced one container now reference the other container.